(06-23-2014, 05:42 PM)DennyCraneEsq Wrote: I hope that this is not off-topic for this chain, but I am considering the HDM Z1, and wonder: What is the operating voltage of the unit? (Or, what is the voltage of the optional battery?). It seems that one could buy something like the Allpowers 23000mAh solar device sold on line, and power the Z1 for a lot less money than their $400 battery. (It occurs to me that 23000 mAH may be at 5V, in which case if operating voltage is say 15V, I only get 7.66 hours to discharge).
The devices maximum output is 12V @ 3A, which is maybe, possibly, almost enough to run your CPAP machine without the humidifier if the pressure isn't set too high.
However the battery capacity is only 83 W/Hours, which means you had better sleep fast, because you only have a couple of hours, even if the power supply is 100% efficient, which it isn't.
I've had very good luck with this: http://www.apneaboard.com/wiki/index.php...tery_power
It will run my CPAP (and a small fan!) all weekend. The down-side is that your horse is not likley to be happy carrying a 105Ah deep- cycle battery.
Whatever you decide to buy, make sure it's returnable, since battery technology just isn't available yet, to handle 60 watts, all night in a small light package. Anybody that says they can do it is either wrong, of has some amazing new technology.